Air and vacuum valve



,May

A. `HARRISON AIR'AND vAcUUMvALvE Filed June 21, 41920 im E! /f/ W' Patented May 24, 1927.

AMOS HARRISON,

. 1,629,189 T OFFICE.

F CHICAGO, ILLINOIS, 0F CHICAGO, ILLINOIS, A

AssIeNoa'ro JAS. r. MARSH e COMPANY, CORPORATION or ILLINoIs.

Am ANI) VACUUM vALvE.

Application filed June 21, 1920. Serial No. 390,568.

My invention belongs to thatl general class ofdevices known as valves or traps, and lates particularly vacuum valve,

reto a Combined air valve,

air breaker and air remover,

and more particularly relates to a construction wherein 1n a steam heating system or the like', air or and discharged to Where f fluid through the being controlled by a valve,

able port, the

o rt, however,

other fluid may be eliminated desired to a suitpassage o which in itself is controlled by the expansion or flotation of suitable mechanism, or

both at one and the same time. sists in a Construction in whie It also Conh while the air or the equivalent may be discharged from the system through the port,its admission will be prevented in a vacuum system.

The invention has among its objects the production of a device of the kind described which is simple,

convenient, compact, durable, reliable, efficient and satisfactory for use Wherever found applicable. objects and advantages Many other of the construction herein shown and described will be obvious to those skilled in the art closure herein 4To this end novel construction, bination of parts scribed, and more in the claims.

In the drawings, Characters indicate like or correspon parts,

The improved devi Referring to casing, which, consists of a ed with heads that the parts and material together iii the desired head or closu with a port 3 terior, as will be hereafter same serving both as an well as a discharge port ter, steam, air part 4 is pre 5 and with a from the disgiven.

my invention consists in the arrangement and comherein shown and departicularly pointed out wherein like reference ding figure is a sectional view through my in the construction shown,

tubular part or shell 1 provid- 2 and 4, it being understood are of the re 2 is prefer communicating with the Inadmission port as or other fluid may pass.

closure or top part 6,

extending as indicated at 7, forming a partition. In shown, an adj valve or seat the ustable as Well as removable particular construction part 8 is provided having a the drawings, I provide a desired size, shape and constructed and secured manner. The bottoni ably provided described, the

through which Wa' The ferably provided withy a port part 4 Part 2, in the preferred construction, has

an extending part 16 projecting into the oasing, and is provided with one or more ports 17 Communicating with the port 3 and with -the interior of the casing. As shown, the extending part 16 is formed with an opening 18 therethrough. Arranged Within the casing is a float member 19, which is mounted on a tubular stem 20 which projects through the opening 18, 21 being a block of suitable cushioning material, for example, rubber or the like cushion the float when it descends, as well as to make the same substantially noiseless. This may be secured on the stem 20 as shown, if preferred. Arranged atfthe up-` per end of the stem 20 is a head 22 which is preferably locked against disengagement or vaccidental loosening by a lock nut 23 or the equivalent for the purpose. As shown, the head 22 is provided with a chamber 23 Connecting with the hollow stem 20 and with orts 24 communicating with and opening 'into the Casing. If desired, a pipe 30 or its equivalent may be provided extending from one or more of the ports 24 to a point adjacent the upper part of the casing, so that air may rise through said pipe and prevent air locking in case the Water rises above the openings 24. l

The head part 22 carries a thermostatio meirber 25, which carries a valve 26 preferably constructed as at 27 to Cooperate With the member 8 and control the passage of fluid through the port 9. I also prefer to rovide guide members 28 or the equivalent which are shown carried by part 8 and which would guide the valve member in its movement and prevent side movement of the mechanism with resulting binding or pinoliing at the point Where the stem 20 goes through the opening 18. The thermostatic member 25 may be Constructed in any suitable maimer, that shown being of metal or the equivalent and filled with a suitable fluid which will expandor contract as the which will serve to case may be, depending upon the temperature, thereby controlling the valve 26. I also prefer to provide a valve 29 of any suitable type, a ball being shown for the purpose which will check or prevent the admission or passage ot' fluid from the chamber 12 into the chamber 11. Valve -29 may bc guided in any desired manner. As shown, the guide members 28 also extend up into the chamber 12 and guide the valvp 29 in its travel.

Referring to the drawing, the operation of the device may he briefly described as follows: Assuming that the device is connected up to a suitable part of a steam system as for example a radiator so that port 3 is the air and vapor inlet andwater return. Air, steam or water can enter the port and pass through the branch ports 17 or through stem 20, entering into the casing. Air can pass up and escape through the port 9, past the valve 29 and out through the pipe 15, which may be connected with the boiler'flue, chimney or wherever desired. When so connected, there is caused a slight suction, which tends to draw the air out of the system. However, any air or other Huid is prevented from entering the casing through the port 9 by the valve 29. Any steam entering the casing will act on the expansion or thermostatic member 25, causing the same to expand and closn the valve 26 so that the steam or vapor may be retained in the casing. Some of the steam may pass up through the tube or stem 20 and through the ports 24 directly on to the thermostatic member, thereby causing the same to quickly operate and perform its function. The discharge of steam from the casing will therefore be prevented except back through the port 3. Likewise, the entry of water into the casing will raise the float, closing the valve. With the valve 26 closed, steam or vapor and water can enter the trap, and the vapor can return through the pipe 20 and port- 3 to be discharged into the system again, preventing the air and vapor from forming an air lock or cushion, which would prevent the admission of water to the trap. hLikewise, after the trap becomes filled with water. the formation of a vacuum is prevented by means of the ports 24 and particularly b v the pipe 30. should the water reach up above the ports 24. By breaking the vacuum, the water in the body of the device is allowed to low out freely and quickly. It willbe noted in this connection that the tube, casing and ports 17 provide substantially a syphon action in which, as the water flows out through the ports 17 ba'ck into the return pipe, air or vapor may be sucked up through the pipe 20, breaking or preventing a vacuum in the upper part of the casing. Even when the casing contains water but not sufficient to close 'the valve 26, any vapor in the system can pass through the tube 2O and control the thermostatic member. The cushion 21 tends to prevent noise whenthe valve is operated.

It will be noted in the device that while large quantities of air may escape freely, the valve will be operated substantially instantaneously either by expansion or flotation, or both at one and the same time. This is particularly desirable as the presence Aof hot water will have a tendency to quickly operate the device. At all times the escape of steam or vapor from the system and t e discharge of water through the port 9 is prevented, while the free escape of air alone may take place without the presence of Water or vapor so the rapid discharge of large quantities of air is permitted. The device may be used upon any sort of system upon which the same may be found applicable.

Having thus described my invention, it is obvious that various immaterial modifications may be made in the same without departing from the spirit of my invention; hence I do not wish to be understood as limiting myself tothe exact form, construction, arrangement and combination of parts herein shown and described, orv uses mentioned. y

What I claim as new and desire to secure by Letters Patent is:

1. In a device of the kind described and in combination, a casing comprising a tubular shell provided with end closures, the closure at the lower end provided with a chambered upwardly-extending part having a port therethrough for the admission to or discharge of Huid from the casing, the upper closure provided with a chamber communicating with the casing, and having an adjustable valve seat in said last mentioned closure, valve mechanism seating on said valve seat for controlling the flow of fluid between said upper closure and casing, means for automatically controlling said valve mechanism by either the admission of a predetermined amountJ of luid to the casing or a predetermined temperature therein, and a movable tubular part open at its upper end adjacent the upper closure and open at its lower end and extended into and communicating with the interior of the u wardly-extending chambered part of tia) lower closure at a point above the inner surface of the bottom wall of the casing.

lea

2. In a device of the character described l and in combination, a casing comprising a tubular shell provided with end closures, the closure at vthe lower end formed with a chambered upwardly extending part having ingeommunication between the chamber und lower end and extending into and eonnnuni- 10 easing, valve mechanism for controlling the eating with the interior of the upwardly passage of fluid through said port, means extending ehambered part of the lower eloor controlling said valve mechanism by sure at 'a point above the inner surface 0f either the admission of :L predetermined the bottom wall of the easing.

I have hereunto l5 amount of fluid to the easing or u predetermined temperature therein, and a movable tubular part open ut its upper end adjacent the upper closure and open at its In testimony whereof, signed my name.

AMGS HARRISON. 

